Mobile Device with Time-Varying Magnetic Field and Single Transaction Account Numbers

1. A mobile phone comprising: circuitry to produce a time-varying magnetic field that mimics a swipe of a magnetic card; and a processor coupled to the circuitry to cause the circuitry to produce a time-varying magnetic field that represents a single transaction account number.

2. The mobile phone of claim 1 wherein the time-varying magnetic field mimics a swipe of a magnetic credit card.

3. The mobile phone of claim 1 wherein the single transaction account number represents financial data.

4. The mobile phone of claim 3 wherein the financial data comprises credit card data.

5. The mobile phone of claim 1 further comprising smartcard circuitry coupled to the processor.

6. The mobile phone of claim 1 wherein the single transaction account number represents access data.

7. The mobile phone of claim 1 wherein the time-varying magnetic field mimics a swipe of a magnetic access card.

8. The mobile phone of claim 1 wherein the time-varying magnetic field is used to perform point-of-sale transactions.

9. A mobile phone comprising: circuitry to produce a time-varying magnetic field that mimics a swipe of a magnetic card; smartcard circuitry for performing transactions using single transaction account numbers; and a processor coupled to the smartcard circuitry and the circuitry to produce a time-varying magnetic field.

10. The mobile phone of claim 9 wherein the smartcard circuitry is configured to perform point-of-sale transactions.

11. The mobile phone of claim 9 wherein the transactions are financial transactions.

12. The mobile phone of claim 9 wherein the time-varying magnetic field mimics a swipe of a magnetic credit card.

13. The mobile phone of claim 9 wherein the single transaction account numbers have a pre-defined sequence.

14. The mobile phone of claim 9 wherein the single transaction account numbers comprise pre-assigned single-use transaction numbers.

15. A mobile phone comprising: circuitry to produce a time-varying magnetic field that mimics a swipe of a magnetic card; circuitry to enable use of single transaction account numbers; and a processor coupled to the circuitry to produce a time-varying magnetic field and to the circuitry to enable use of single transaction account numbers, the processor configured to cause a time-varying magnetic field to be produced that represents a single transaction account number.

16. The mobile phone of claim 15 wherein the circuitry to enable use of single transaction account numbers comprises smartcard circuitry.

17. The mobile phone of claim 15 wherein the single transaction account numbers have a pre-defined sequence.

18. The mobile phone of claim 15 wherein the single transaction account numbers comprise pre-assigned single-use transaction numbers.